Desa VYGF33PRC Quick start guide

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WARNING: If the information in this manual is not fol-
lowed exactly, a fire or explosion may result causing
property damage, personal injury or loss of life.
— Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any other
appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any
phone in your building.
• Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire
department.
— Installation and service must be performed by a quali-
fied installer, service agency or the gas supplier.
UNVENTED (VENT-FREE) GAS FIREPLACE
OWNER’S OPERATION AND INSTALLATION MANUAL
VYGF33PRC, VYGF33NRC, FPVF33PRA (MILLIVOLT) AND
FPVF33NRA (MILLIVOLT)
REMOTE-READY GAS FIREPLACE SYSTEMS
Shown with optional cabinet mantel,
hearth base and trim accessories.
Patent Pending

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2
WARNING: Improper installation, adjustment, altera-
tion, service or maintenance can cause injury or prop-
erty damage. Refer to this manual for correct installation
and operational procedures. For assistance or addi-
tional information consult a qualified installer, service
agency or the gas supplier.
WARNING: This is an unvented gas-fired heater. It uses
air (oxygen) from the room in which it is installed. Provi-
sions for adequate combustion and ventilation air must
be provided. Refer to Air for Combustion and Ventilation
section on page 5 of this manual.
This appliance may be installed in an aftermarket,* per-
manently located, manufactured (mobile) home, where
not prohibited by local codes.
This appliance is only for use with the type of gas indi-
cated on the rating plate. This appliance is not convert-
ible for use with other gases.
* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer
State of Massachusetts: The installation must be made by a licensed plumber or gas fitter in the
Commonwealth of Massachusetts.
Sellers of unvented propane or natural gas-fired supplemental room heaters shall provide to each
purchaser a copy of 527 CMR 30 upon sale of the unit.
Vent-free gas products are prohibited for bedroom and bathroom installation in the Common-
wealth of Massachusetts.
TABLE OF CONTENTS
Safety Information ............................................... 3
Product Identification ........................................... 4
Local Codes ........................................................ 5
Unpacking ........................................................... 5
Product Features ................................................. 5
Air For Combustion And Ventilation ..................... 5
Installation ........................................................... 8
Operating Fireplace ........................................... 19
Inspecting Burner .............................................. 23
Cleaning and Maintenance ................................ 24
Troubleshooting ................................................. 25
Wiring Diagram .................................................. 29
Specifications .................................................... 29
Replacement Parts ............................................ 29
Technical Service .............................................. 29
Service Hints ..................................................... 29
Illustrated Parts Breakdown and Parts List ....... 30
Accessories ....................................................... 38
Warranty Information ...........................Back Cover

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113109-01B 3
SAFETY INFORMATION
WARNING: This product con-
tains and/or generates chemicals
known to the state of California
to cause cancer or birth defects
or other reproductive harm.
IMPORTANT: Read this owner’s
manual carefully and completely
before trying to assemble,
operate or service this heater.
Improper use of this heater can
cause serious injury or death
from burns, fire, explosion,
electrical shock and carbon
monoxide poisoning.
DANGER: Carbon monoxide
poisoning may lead to death!
Carbon Monoxide Poisoning: Early signs of carbon
monoxide poisoning resemble the flu, with head-
aches, dizziness or nausea. If you have these signs,
the fireplace may not be working properly. Get
fresh air at once! Have fireplace serviced. Some
people are more affected by carbon monoxide than
others. These include pregnant women, people with
heart or lung disease or anemia, those under the
influence of alcohol and those at high altitudes.
Natural and Propane/LP Gas: Natural and Propane/LP
gases are odorless. An odor-making agent is added
to these gases. The odor helps you detect a gas leak.
However, the odor added to the gas can fade. Gas
may be present even though no odor exists.
Make certain you read and understand all warnings.
Keep this manual for reference. It is your guide to
safe and proper operation of this fireplace.
WARNING: Any change to
this heater or its controls can
be dangerous.
WARNING: Do not use a
blower insert, heat exchanger
insert or other accessory not ap-
proved for use with this heater.
WARNING: Do not allow fans
to blow directly into the fireplace.
Avoid any drafts that alter burner
flame patterns. Ceiling fans can
create drafts that alter burner
flame patterns. Altered burner
patterns can cause sooting.
Due to high temperatures, the
appliance should be located out
of traffic and away from furniture
and draperies.
Do not place clothing or other
flammable material on or near
the appliance. Never place any
objects on the heater.
Fireplace front and screen be-
come very hot when running fire-
place. Keep children and adults
away from hot surfaces to avoid
burns or clothing ignition. Fire-
place will remain hot for a time
after shutdown. Allow surfaces
to cool before touching.
Carefully supervise young chil-
dren when they are in the room
with fireplace. When using the
optional hand-held remote ac-
cessory, keep selector switch
in the OFF position to prevent
children from turning on burners
with remote.
You must operate this fireplace
with the fireplace screen and
hood in place. Make sure fire-
place screen and hood are in
place before running fireplace.
Keep the appliance area clear
and free from combustible ma-
terials, gasoline and other flam-
mable vapors and liquids.

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4
O
F
F
P
I
L
O
T
O
N
H
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L
O
SAFETY INFORMATION
Continued
1. This appliance is only for use with the type of
gas indicated on the rating plate. This appliance
is not convertible for use with other gases.
2. Do not place propane/LP supply tank(s) in-
side any structure. Locate propane/LP supply
tank(s) outdoors (propane/LP units only).
3. If you smell gas
• shut off gas supply
• do not try to light any appliance
• do not touch any electrical switch; do not
use any phone in your building
• immediately call your gas supplier from
a neighborʼs phone. Follow the gas
supplierʼs instructions
• if you cannot reach your gas supplier, call
the fire department
4. This fireplace shall not be installed in a bed-
room or bathroom.
5. Do not use this fireplace as a wood-burning
fireplace. Use only the logs provided with the
fireplace.
6. Do not add extra logs or ornaments such as
pine cones, vermiculite or rock wool. Using
these added items can cause sooting. Do not
add lava rock around base. Rock and debris
could fall into the control area of fireplace.
7. To prevent the creation of soot, follow the
instructions in Cleaning and Maintenance,
page 24.
8. Before using furniture polish, wax, carpet
cleaner or similar products, turn heater off. If
heated, the vapors from these products may
create a white powder residue within burner
box or on adjacent walls or furniture.
9. This fireplace needs fresh air ventilation to run
properly. This fireplace has an Oxygen Depletion
Sensing (ODS) safety shutoff system. The ODS
shuts down the fireplace if enough fresh air is not
available. See Air for Combustion and Ventila-
tion, page 5. If fireplace keeps shutting off, see
Troubleshooting, page 25.
10. Do not run fireplace
• where flammable liquids or vapors are
used or stored
• under dusty conditions
11. Do not use this fireplace to cook food or burn
paper or other objects.
12. Do not use fireplace if any part has been
exposed to or under water. Immediately call
a qualified service technician to inspect the
fireplace and to replace any part of the control
system and any gas control which has been
under water.
13. Do not operate fireplace if any log is broken.
Do not operate fireplace if a log is chipped
(dime-sized or larger).
14. Turn fireplace off and let cool before servicing.
Only a qualified service person should service
and repair fireplace.
15. Operating fireplace above elevations of 4,500
feet could cause pilot outage.
16. To prevent performance problems in
propane/LP units, do not use propane/LP
fuel tanks of less than 100 lbs. capacity
(propane/LP units only).
17. Provide adequate clearances around air
openings.
PRODUCT
IDENTIFICATION
Figure 1 - Log Base Assembly
Piezo
Ignitor
Optional
Remote
Control
Control
Knobs
Firebox
Hood
Firebox
Support
Log Set (VYGF shown)
Remote Selector
Switch (Optional)
Top Outer
Casing
Blower Assembly
(Optional)
Screen
Assembly
Figure 2 - Fireplace
Louver

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113109-01B 5
LOCAL CODES
Install and use fireplace with care. Follow all local
codes. In the absence of local codes, use the lat-
est edition of The National Fuel Gas Code, ANSI
Z223.1/NFPA 54*.
*Available from:
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
UNPACKING
CAUTION: Do not remove the
data plates attached to the heater
base assembly. The data plates
contain important warranty and
safety information.
1. With utility knife, cut the carton all the way
around above the staples on the bottom tray.
Lift the carton off the heater. Remove packing.
Note: The hood is located in the packing on
the right hand side of the heater front. Lift the
heater off the bottom tray.
2. Locate two screws above top corners of the
fireplace screen. Remove and discard these
screws. Lift fireplace screen up and pull out
to remove.
3. Remove protective packaging applied to logs,
log base assembly and fireplace.
4. Remove fireplace hood from carton insert.
5. Check all items for any shipping damage. If
damaged, promptly inform dealer where you
bought fireplace.
PRODUCT FEATURES
OPERATION
This vent-free fireplace is clean burning. It requires
no outside venting. There is no heat loss out a
vent or up a chimney. Heat is generated by both
realistic flames. When used without the blower, the
fireplace requires no electricity making it ideal for
emergency backup heat. This heater is designed
for vent-free operation. It has been tested and ap-
proved to ANSI Z21.11.2 standard for unvented
heaters. State and local codes in some areas pro-
hibit the use of vent-free heaters.
SAFETY DEVICE
This fireplace has a pilot with an Oxygen Depletion
Sensing (ODS) safety shutoff system. The ODS/
pilot is a required feature for vent-free room heat-
ers. The ODS/pilot system shuts off the fireplace
if there is not enough fresh air.
PIEZO IGNITION SYSTEM
This fireplace has a piezo ignitor. This system
requires no matches, batteries or other sources to
light fireplace.
OPTIONAL REMOTE CONTROL UNITS
There are four optional remote controls that can be
purchased separately for this log heater:
• wall switch
• wall thermostat
• hand-held ON/OFF remote
• hand-held thermostat remote
See Accessories, page 38.
OPTIONAL BLOWER ASSEMBLY
(GA3700 SERIES & GA3700T
SERIES)
This fireplace accepts an optional blower assembly
(not included). The GA3700T Series blower oper-
ates thermostatically and features a variable speed
control. The GA3700 Series blower operates man-
ually and also features a variable speed control.
The blower circulates heated air from the fireplace
into the room. See Accessories, page 38.
AIR FOR COMBUSTION
AND VENTILATION
WARNING: This heater shall
not be installed in a confined
space or unusually tight construc-
tion unless provisions are provid-
ed for adequate combustion and
ventilation air. Read the following
instructions to insure proper fresh
air for this and other fuel-burning
appliances in your home.
Todayʼs homes are built more energy efficient
than ever. New materials, increased insulation and
new construction methods help reduce heat loss
in homes. Home owners weather strip and caulk
around windows and doors to keep the cold air out
and the warm air in. During heating months, home
owners want their homes as airtight as possible.

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6
While it is good to make your home energy effi-
cient, your home needs to breathe. Fresh air must
enter your home. All fuel-burning appliances need
fresh air for proper combustion and ventilation.
Exhaust fans, fireplaces, clothes dryers and fuel
burning appliances draw air from the house to
operate. You must provide adequate fresh air for
these appliances. This will insure proper venting
of vented fuel-burning appliances.
PROVIDING ADEQUATE
VENTILATION
The following are excerpts from National Fuel
Gas Code, ANSI Z223.1/NFPA 54, Section 5.3,
Air for Combustion and Ventilation.
All spaces in homes fall into one of the three fol-
lowing ventilation classifications:
1. Unusually Tight Construction
2. Unconfined Space
3. Confined Space
The information on pages 5 through 7 will help you
classify your space and provide adequate ventilation.
Unusually Tight Construction
The air that leaks around doors and windows may
provide enough fresh air for combustion and ven-
tilation. However, in buildings of unusually tight
construction, you must provide additional fresh air.
Unusually tight construction is defined as
construction where:
a. walls and ceilings exposed to the out-
side atmosphere have a continuous
water vapor retarder with a rating of
one perm (6 x 10-11 kg per pa-sec-m2) or
less with openings gasketed or sealed
and
b. weather stripping has been added on
openable windows and doors and
c. caulking or sealants are applied to
areas such as joints around window
and door frames, between sole plates
and floors, between wall-ceiling joints,
between wall panels, at penetrations
for plumbing, electrical and gas lines
and at other openings.
If your home meets all of these three criteria,
you must provide additional fresh air. See
Ventilation Air From Outdoors, page 7.
If your home does not meet all of the three
criteria above, proceed to Determining
Fresh-Air Flow For Heater Location.
Confined and Unconfined Space
The National Fuel Gas Code, ANSI Z223.1/NFPA
54 defines a confined space as a space whose
volume is less than 50 cubic feet per 1,000 Btu
per hour (4.8 m3 per kw) of the aggregate input
rating of all appliances installed in that space and
an unconfined space as a space whose volume is
not less than 50 cubic feet per 1,000 Btu per hour
(4.8 m3 per kw) of the aggregate input rating of
all appliances installed in that space. Rooms com-
municating directly with the space in which the
appliances are installed*, through openings not
furnished with doors, are considered a part of the
unconfined space.
* Adjoining rooms are communicating only if
there are doorless passageways or ventilation grills
between them.
DETERMINING FRESH-AIR FLOW
FOR HEATER LOCATION
Determining if You Have a Confined or
Unconfined Space
Use this work sheet to determine if you have a
confined or unconfined space.
Space: Includes the room in which you will install
fireplace plus any adjoining rooms with doorless pas-
sageways or ventilation grills between the rooms.
1. Determine the volume of the space (length x
width x height).
Length x Width x Height =__________cu. ft.
(volume of space)
Example: Space size 20 ft. (length) x 16 ft.
(width) x 8 ft. (ceiling height) = 2560 cu. ft.
(volume of space)
If additional ventilation to adjoining room is
supplied with grills or openings, add the volume
of these rooms to the total volume of the space.
2. Multiply the space volume by 20 to determine
the maximum Btu/Hr the space can support.
__________ (volume of space) x 20 = (Maxi-
mum Btu/Hr the space can support)
Example: 2560 cu. ft. (volume of space) x 20 =
51,200 (maximum Btu/Hr the space can support)
3. Add the Btu/Hr of all fuel burning appliances in
the space.
Vent-free fireplace ___________ Btu/Hr
Gas water heater* ___________ Btu/Hr
Gas furnace ___________ Btu/Hr
Vented gas heater ___________ Btu/Hr
Gas fireplace logs ___________ Btu/Hr
Other gas appliances* + ___________ Btu/Hr
Total = ___________ Btu/Hr
* Do not include direct-vent gas appliances. Di-
rect-vent draws combustion air from the outdoors
and vents to the outdoors.
AIR FOR COMBUSTION
AND VENTILATION
Continued

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113109-01B 7
Example:
Gas water heater ______________ Btu/Hr
Vent-free fireplace + _____________ Btu/Hr
Total = _____________ Btu/Hr
4. Compare the maximum Btu/Hr the space can
support with the actual amount of Btu/Hr used.
_________ Btu/Hr (maximum the space can support)
_________ Btu/Hr (actual amount of Btu/Hr used)
Example: 51,200 Btu/Hr (maximum the space
can support)
73,000 Btu/Hr (actual amount of
Btu/Hr used)
The space in the above example is a confined space
because the actual Btu/Hr used is more than the maxi-
mum Btu/Hr the space can support. You must provide
additional fresh air. Your options are as follows:
A. Rework worksheet, adding the space of an adjoin-
ing room. If the extra space provides an unconfined
space, remove door to adjoining room or add
ventilation grills between rooms. See Ventilation
Air From Inside Building.
B. Vent room directly to the outdoors. See Ventila-
tion Air From Outdoors.
C. Install a lower Btu/Hr fireplace, if lower Btu/Hr
size makes room unconfined.
If the actual Btu/Hr used is less than the maximum
Btu/Hr the space can support, the space is an uncon-
fined space. You will need no additional fresh air
ventilation.
WARNING: If the area in which
the fireplace may be operated
is smaller than that defined as
an unconfined space or if the
building is of unusually tight
construction, provide adequate
combustion and ventilation air by
one of the methods described in
the National Fuel Gas Code, ANSI
Z223.1/NFPA 54 Section 5.3 or
applicable local codes.
VENTILATION AIR
Ventilation Air From Inside Building
This fresh air would come from an adjoining un-
confined space. When ventilating to an adjoining
unconfined space, you must provide two perma-
nent openings: one within 12" of the ceiling and
one within 12" of the floor on the wall connecting
40,000
33,000
73,000
AIR FOR COMBUSTION
AND VENTILATION
Continued
Figure 3 - Ventilation Air from Inside
Building
Or
Remove
Door into
Adjoining
Room,
Option
3
Ventilation Grills
Into Adjoining Room,
Option 2
Ventilation
Grills
Into Adjoining
Room,
Option 1
12"
12"
the two spaces (see options 1 and 2, Figure 3). You
can also remove door into adjoining room (see
option 3, Figure 3). Follow the National Fuel Gas
Code, ANSI Z223.1/NFPA 54, Section 5.3, Air for
Combustion and Ventilation for required size of
ventilation grills or ducts.
Figure 4 - Ventilation Air from Outdoors
Outlet
Air
Ventilated
Attic
Outlet
A
ir
Inlet
Air
Inlet Air Ventilated
Crawl Space
To
Crawl
Space
To Attic
Ventilation Air From Outdoors
Provide extra fresh air by using ventilation grills or
ducts. You must provide two permanent openings:
one within 12" of the ceiling and one within 12"
of the floor. Connect these items directly to the
outdoors or spaces open to the outdoors. These
spaces include attics and crawl spaces. Follow the
National Fuel Gas Code, ANSI Z223.1/NFPA 54,
Section 5.3, Air for Combustion and Ventilation for
required size of ventilation grills or ducts.
IMPORTANT: Do not provide openings for inlet
or outlet air into attic if attic has a thermostat-
controlled power vent. Heated air entering the attic
will activate the power vent.

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8
INSTALLATION
NOTICE: This heater is intended
for use as supplemental heat.
Use this heater along with your
primary heating system. Do not
install this heater as your pri-
mary heat source. If you have a
central heating system, you may
run system’s circulating blower
while using heater. This will help
circulate the heat throughout the
house. In the event of a power
outage, you can use this heater
as your primary heat source.
WARNING: A qualified ser-
vice person must install fire-
place. Follow all local codes.
WARNING: Make sure the
selector switch is in the OFF po-
sition before installing heater
WARNING: Never install the
fireplace
• in a bedroom or bathroom
• in a recreational vehicle
• where curtains, furniture, cloth-
ing or other flammable objects
are less than 42 inches from the
front, top or sides of the heater
• in high traffic areas
• in windy or drafty areas
CAUTION: This fireplace cre-
ates warm air currents. These
currents move heat to wall sur-
faces next to fireplace. Installing
fireplace next to vinyl or cloth
wall coverings or operating
heater where impurities (such
as, but not limited, to tobacco
smoke, aromatic candles, clean-
ing fluids, oil or kerosene lamps,
etc.) in the air exist, may discolor
walls or cause odors.
Note: Your fireplace is designed to be used in zero
clearance installations. Wall or framing material can be
placed directly against any exterior surface on the rear,
sides or top of your fireplace, except where standoff
spacers are integrally attached. If standoff spacers are
attached to your fireplace, these spacers can be placed
directly against wall or framing materials.
Use the dimensions shown for rough openings to
create the easiest installation. See Built-In Fire-
place Installation, page 11.
IMPORTANT: Vent-free heaters add moisture to
the air. Although this is beneficial, installing fire-
place in rooms without enough ventilation air may
cause mildew to form from too much moisture. See
Air for Combustion and Ventilation, page 5.
IMPORTANT: Make sure the fireplace is level. If
fireplace is not level, log set will not work properly.
CHECK GAS TYPE
Use the correct gas type (natural or propane/LP)
for your fireplace. If your gas supply is not cor-
rect, do not install fireplace. Call dealer where you
bought fireplace for proper type fireplace.
WARNING: This appliance
is equipped for (natural or pro-
pane/LP) gas. Field conversion
is not permitted.
ELECTRICAL HOOKUP
(Models GA3700 Series and GA3700T
Series Blower Accessories and GA3555
Internal Duplex Kit)
This fireplace accepts a blower assembly with an
electrical cord. The electrical cord is five feet in
length. You must locate fireplace within reach of
a 120 volt grounded electrical outlet. If not, you
must install an electrical outlet within reach of
fireplace power cord. The GA3555 outlet acces-
sory is used for built-in applications with blower
accessory installed.
INSTALLING HOOD
Install hood to top of firebox as shown in Figure 5.
Use 3 Phillips screws provided.
Figure 5 - Installing Hood to Firebox

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113109-01B 9
ASSEMBLING AND ATTACHING
OPTIONAL PERIMETER TRIM
(Included with Mantel Accessory)
IMPORTANT: If you are recessing the firebox in a
wall, do not attach perimeter trim at this time. See
Built-In Fireplace Installation, page 11.
Note: The instructions below show assembling
and attaching perimeter trim to fireplace.
1. Remove packaging from three pieces of pe-
rimeter trim.
2. Locate four perimeter screws, two adjusting
plates with set screws and two shims in the
hardware packet.
3. Align shim under adjusting plate as shown in
Figure 6.
4. Slide one end of adjusting plate/shim in slot
on mitered edge of top perimeter trim (see
Figure 6).
5. Slide other end of adjusting plate/shim in slot
on mitered edge of side perimeter trim (see
Figure 6).
6. While firmly holding edges of perimeter trim
together, tighten both set screws on the adjust-
ing plate with slotted screwdriver.
7. Repeat steps 1 through 6 for other side.
8. Tighten trim hanging screws (#10 x 6.25
shoulder) into holes in cabinets. Place the
assembled trim onto fireplace cabinet. Align
hanging notches on trim with hanging screws
on side of fireplace (see Figure 7). Push trim
firmly into place, sliding hanging notches over
hanging screws.
INSTALLATION
Continued
Figure 7 - Attaching Perimeter Trim to
Fireplace
Figure 6 - Assembling Perimeter Trim
Side Trim
Top
Trim
Slot
Mitered
Edge
Slot
Shim
Set Screws
Adjusting
Plate
Trim
Hanging
Screws
Assembled
Trim
Hanging
Notches
on Trim
INSTALLATION CLEARANCES
WARNING: Maintain the
minimum clearances. If you can,
provide greater clearances from
floor, ceiling and adjoining wall.
Carefully follow the instructions below. This will
ensure safe installation.
Minimum Clearances For Side Combustible
Material, Side Wall and Ceiling
A. Clearances from the side of the fireplace
cabinet to any combustible material and wall
should follow diagram in Figure 8.
Example: The face of a mantel, bookshelf,
etc. is made of combustible material and
protrudes 3 1/2" from the wall. This combus-
tible material must be 4" from the side of the
fireplace opening (see Figure 8).
B.
Clearances from the top of the fireplace opening
to the ceiling should not be less than 42 inches.
Minimum Clearance to Combustible Materials
Top: 42", Left and Right Sides: 16"
Bottom and Rear: 0"
Figure 8 - Minimum Clearance for
Combustible to Wall
*Minimum 16 inches from Side Wall
Example
*

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10
INSTALLATION
Continued
CONVENTIONAL FIREPLACE
INSTALLATION
Conventional installation of this fireplace involves
installing fireplace along with the corner, face or
cabinet mantel with hearth base accessories against
a wall in your home. Follow the instructions below
to install the fireplace in this manner.
Note: The instructions in this section show instal-
lation using the cabinet mantel and hearth base
accessories. The hearth base accessory shown
is optional for this installation. You can install
fireplace and cabinet mantel directly on the floor.
The corner mantel accessory (VYGF models only)
can only be paired with the corner hearth base. If
mounting fireplace and cabinet or corner mantel
to the floor, an optional G3005 Series Slim Base
kit may be installed.
1. Assemble cabinet mantel, hearth base and
trim accessories. Assembly instructions are
included with each accessory.
2. When installing blower, install a properly
grounded, 120 volt three-prong electrical out-
let at fireplace location if an outlet is not there.
If possible, locate outlet so cabinet mantel will
cover it when installed (see Figure 9).
3. Install gas piping to fireplace location. This in-
stallation includes an approved flexible gas line
(if allowed by local codes) after the equipment
shutoff valve. The flexible gas line must be the
last item installed on the gas piping. See Install-
ing Gas Piping to Fireplace Location, page 13.
4. Place hearth base accessory against wall at
installation location. Cut an access hole in
hearth top to run flexible gas line to fireplace
(see Figure 9). Make sure to locate access hole
so cabinet mantel will cover it when installed.
Note: You can secure base to floor using wood
screws. Countersink screw heads and putty over.
5. Route flexible gas line through access hole in
hearth base.
6. Center cabinet mantel on hearth base (see Figure
10). Make sure mantel is flush against wall.
7. Break off nailing flanges (see Figure 11) with
hammer or pliers.
8. Place cardboard or other protective material
on top of hearth base. Carefully set fireplace
on protective material, with back of fireplace
inside mantel opening.
9. Attach flexible gas line from fireplace gas
regulator to gas supply. See Connecting
Fireplace to Gas Supply, page 14.
Figure 9 - Placing Hearth Base
Accessory Against Wall
Electrical
Outlet
Hearth
Base
Rigid
Gas
Line
Gas
Line
Access
Hole
Figure 10 - Installing Cabinet Mantel
Cabinet
Mantel
Figure 11 - Location of Nailing Flanges
Nailing
Flanges
Figure 12 - Inserting Fireplace Into
Cabinet Mantel

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113109-01B 11
INSTALLATION
Continued
10. If blower is installed, route blower electrical cord
through access holes in either side of fireplace.
Note: Bushing may be moved if necessary. Plug
electrical cord into electrical outlet.
11. Carefully insert fireplace into cabinet mantel.
Be careful not to scratch or damage hearth
base, cabinet mantel or any laminate trim on
hearth base (VYGF models only). Remove
protective material from top of hearth base and
from front of fireplace (if any). Note: You can
secure fireplace to hearth or floor. Open lower
louver. Locate screw holes in bottom of base.
Tighten wood screws through these holes and
into hearth or floor.
12. Check all gas connections for leaks. See
Checking Gas Connections, page 15.
BUILT-IN FIREPLACE INSTALLATION
Built-in installation of this fireplace involves
installing fireplace into a framed-in enclosure.
This makes the front of fireplace flush with wall.
If installing a mantel above the fireplace, you
must follow the clearances shown in Figure 20,
page 13. Follow the instructions below to install
the fireplace in this manner.
Actual Framing
Height 32 3/8" 33"
Front Width 34 5/16" 35 1/2"
Depth 16 11/16" 17 3/4"
Models VYGF33PRB and VYGF33NRB
1. Frame in rough opening. Use dimensions shown
in Figure 13 for the rough opening. If installing
in a corner, use dimensions shown in Figure 14
for the rough opening. The height is 33" which
is the same as the wall opening above.
2. If using blower, install and properly ground
GA3555, three-prong 120 volt electrical out-
let, in fireplace. Follow instructions included
in kit (see Accessories, page 38).
3. Install gas piping to fireplace location. This in-
stallation includes an approved flexible gas line
(if allowed by local codes) after the equipment
shutoff valve. The flexible gas line must be the
last item installed on the gas piping. See Install-
ing Gas Piping to Fireplace Location, page 13.
4. Carefully set fireplace in front of rough opening
with back of fireplace inside wall opening.
5. Plug electrical cord into electrical outlet
installed in step 2.
6. Carefully insert fireplace into rough opening.
7. Attach flexible gas line to gas supply. See Con-
necting Fireplace to Gas Supply, page 14.
8. Attach fireplace to wall studs using nails or
wood screws through holes in nailing flange
(see Figure 15).
9. Check all gas connections for leaks. See
Checking Gas Connections, page 15.
10. Install perimeter trim after final finishing and/or
painting of wall (see Figure 7, page 9).
35 1/2"
17 3/4"
33"
Figure 13 - Rough Opening for Installing
in Wall
39 3/8"
27 7/8"
55 5/8"
35 1/2"
Figure 14 - Rough Opening for Installing
in Corner
Figure 15 - Attaching Fireplace to Wall
Studs
Nailing
Flanges
Nails or
Wood
Screws

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12
INSTALLATION
Continued
Models FPVF33PRA and FPVF33NRA
WARNING: A qualified electri-
cian must connect electrical wiring
to duplex outlet for built-in instal-
lation. Follow all local codes.
1. Frame in rough opening. Use dimensions
shown in Figure 16 for the rough opening.
2. If using blower, install wiring and properly
ground the three-prong, 120 volt electrical
outlet in fireplace.
3. Before replacing bottom of firebox, install
duplex outlet to the right support bracket in
the bottom of firebox (see Figure 17).
4. Route wires from electrical box through
smallest hole in outer casing using strain relief
fitting provided (see Figure 17).
5. Connect wires from the electrical box to
duplex outlet. Match wire colors to those
indicated on duplex outlet. Be sure to connect
ground wire.
6. Install shield to end of right support bracket
and behind the firebox wrapper with 2 screws
provided (see Figure 18).
7. Plug blower cord into duplex outlet. Note:
On thermostat model fireplaces, route power
cord to the back of the fireplace to clear
thermostat valve.
8. Replace bottom of firebox.
9. Install gas piping to fireplace location. This
installation includes an approved flexible
gas line (if allowed by local codes) after the
equipment shutoff valve. The flexible gas line
must be the last item installed on the gas pip-
ing. See Installing Gas Piping to Fireplace
Location, page 13.
10. Carefully set fireplace in front of rough opening
with back of fireplace inside wall opening.
11. Attach flexible gas line to gas supply. See Con-
necting Fireplace to Gas Supply, page 14.
12. Plug electrical cord into electrical outlet
installed in step 2.
13. Carefully insert fireplace into rough opening.
14. Attach fireplace to wall studs using nails or
wood screws through holes in nailing flange
(see Figure 19).
15. Check all gas connections for leaks. See
Checking Gas Connections, page 15.
16. Install brass trim after final finishing and/or
painting of wall (see Figure 7, page 6).
35 1/2"
17 3/4"
33"
Figure 16 - Rough Opening for Installing
in Wall
Blower
Support
Bracket
Cable from
Electrical
Source
Duplex
Outlet
Screw
Blower
Power
Cord
Strain
Relief Fitting
Figure 17 - Connecting Duplex Outlet
Figure 19 - Attaching Fireplace to Wall Studs
Nailing
Flanges
Nails or
Wood
Screws
Screws
Support Bracket
Firebox
Wrapper
Power
Cord
Figure 18 - Attaching Fireplace to Wall Studs

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113109-01B 13
INSTALLATION
Continued
Mantel Clearances for Built-In
Installation
If placing mantel above built-in fireplace, you must
meet minimum clearance between mantel shelf and
top of fireplace opening.
NOTICE: If your installation does
not meet the minimum clear-
ances shown, you must do one
of the following:
• raise the mantel to an accept-
able height
• remove the mantel
NOTICE: Surface temperatures
of adjacent walls and mantels be-
come hot during operation. Walls
and mantels above the firebox
may become hot to the touch.
If installed properly, these tem-
peratures meet the requirement
of the national product standard.
Follow all minimum clearances
shown in this manual.
Figure 20 - Minimum Mantel Clearances
for Built-In Installation
Supplied
Firebox
Hood
Must Be
Used at
All Times
Wire-mesh
Screen
Firebox
Noncombustible
Material May
Project Off this
Surface above
the Firebox
Hood
Mantel Shelf
13"
16"
19"
21"
2 1/2"
6"
8"
10"
Note: All vertical
measurements are
from top of fireplace
hood opening to
bottom of mantel
shelf. These minimum
clearances replace any
other recommended
clearances supplied
with your ANSI Z21.11.2
approved gas logs.
Wall board or facing
material (above
firebox) may be of
combustible material,
including decorative
mantel ornaments or
other similar projec-
tions off of the facing
material. Framing
Material
INSTALLING GAS PIPING TO
FIREPLACE LOCATION
WARNING: This appliance
requires a 1/2" NPT (National
Pipe Thread) inlet connection to
the pressure regulator.
WARNING: A qualified
service person must connect
fireplace to gas supply. Follow
all local codes.
CAUTION: Never connect pro-
pane/LP fireplace directly to the
propane/LP supply. This fireplace
requires an external regulator
(not supplied). Install the external
regulator between the fireplace
and propane/LP supply.
WARNING: Never connect
natural gas fireplace to private
(non-utility) gas wells. This gas
is commonly known as well-
head gas.
Installation Items Needed
Before installing fireplace, make sure you have
the items listed below.
• external regulator for propane/LP unit only
(supplied by installer)
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• equipment shutoff valve *
• test gauge connection *
• sediment trap (optional)
• tee joint
• pipe wrench
• approved flexible gas line with gas connector
(if allowed by local codes) (not provided)
* A CSA design-certified equipment shutoff valve
with 1/8" NPT tap is an acceptable alternative to
test gauge connection. Purchase the optional CSA
design-certified equipment shutoff valve from your
dealer. See Accessories, page 38.

www.desatech.com 113109-01B
14
WARNING: Use pipe joint
sealant that is resistant to liquid
petroleum (LP) gas.
We recommend that you install a sediment trap in
supply line as shown in Figure 22. Locate sediment
trap where it is within reach for cleaning. Install in
piping system between fuel supply and fireplace.
Locate sediment trap where trapped matter is not
likely to freeze. A sediment trap traps moisture
and contaminants. This keeps them from going
into fireplace gas controls. If sediment trap is not
installed or is installed wrong, fireplace may not
run properly.
INSTALLATION
Continued
For propane/LP units, the installer must supply
an external regulator. The external regulator will
reduce incoming gas pressure. You must reduce
incoming gas pressure to between 11 and 14 inches
of water. If you do not reduce incoming gas pres-
sure, heater regulator damage could occur. Install
external regulator with the vent pointing down
as shown in Figure 21. Pointing the vent down
protects it from freezing rain or sleet.
CAUTION: Use only new,
black iron or steel pipe. Inter-
nally-tinned copper tubing may
be used in certain areas. Check
your local codes. Use pipe of
1/2" diameter or greater to allow
proper gas volume to fireplace.
If pipe is too small, undue loss
of volume will occur.
Installation must include an equipment shutoff valve,
union and plugged 1/8" NPT tap. Locate NPT tap
within reach for test gauge hook up. NPT tap must
be upstream from fireplace (see Figure 22).
IMPORTANT: Install equipment shutoff valve
in an accessible location. The equipment shutoff
valve is for turning on or shutting off the gas to
the appliance.
Check your building codes for any special re-
quirements for locating equipment shutoff valve
to fireplaces.
Apply pipe joint sealant lightly to male NPT
threads. This will prevent excess sealant from
going into pipe. Excess sealant in pipe could result
in clogged fireplace valves. Never use sealant on
flare threads.
Figure 21 - External Regulator on
Propane/LP Supply Tank with Vent
Pointing Down
External
Regulator
Vent
Pointing
Down
Propane/LP
Supply Tank
Figure 22 - Gas Connection
* Purchase the optional CSA design-certified
equipment shutoff valve from your dealer. See
Accessories, page 38.
** Minimum inlet pressure for purpose of input
adjustment.
Sediment Trap
CSA Design-Certified
Equipment Shutoff Valve
With 1/8" NPT Tap*
3" Minimum
Cap Pipe Tee
Nipple Joint
Natural Gas
From Gas Meter
(5" W.C.** to
10.5" W.C. Pressure)
Propane/LP
From External
Regulator
(11" W.C.** to
14" W.C.
Pressure)
CONNECTING FIREPLACE TO GAS
SUPPLY
Installation Items Needed
• 5/16" hex socket wrench or nut-driver
• Phillips screwdriver
• sealant (resistant to propane/LP gas, not pro-
vided)
1. Remove fireplace screen. Remove two screws
that hold fireplace screen in place for shipping.
These screws are located near top of screen.
Discard screws. Lift fireplace screen up and
pull out to remove.

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113109-01B 15
2. Remove screws that attach log base assembly
to fireplace (see Figure 23). Carefully lift up
log base assembly and remove from fireplace
(see Figure 23).
Note: If adding the G8005 series brick liner acces-
sory, install it now. Follow instructions in G8005
accessory kit.
CAUTION: Do not pick up
log base assembly by burner.
This could damage burner. Only
handle base by grates.
3. Route gas line (provided by installer) from
equipment shutoff valve to fireplace. Route
flexible gas supply line through one of the
access holes.
NOTICE: Most building codes
do not permit concealed gas
connections. A flexible gas line
is provided to allow accessibility
from the fireplace (see Figure 24).
The flexible gas supply line con-
nection to the equipment shutoff
valve should be accessible.
4. Attach the flexible gas line to gas supply (see
Figure 24). Check tightness of flexible gas
line attached to gas regulator of fireplace (see
Figure 24).
5. Check all gas connections for leaks. See
Checking Gas Connections.
INSTALLATION
Continued
Figure 23 - Removing Log Base
Assembly From Fireplace
Figure 24 - Attaching Flexible Gas Lines
Together
Flexible Gas Line
from Fireplace
Gas Regulator
To Fireplace Gas
Regulator Equipment Shutoff Valve
Provided by Installer
Propane/LP
To External
Regulator
Natural Gas
To Gas Meter
6. Replace log base assembly back into fireplace.
Feed flexible gas line into fireplace base area
while replacing log base assembly. Make sure
the entire flexible gas line is in fireplace base
area. Reattach log base assembly to fireplace
with screws removed in step 2.
CHECKING GAS CONNECTIONS
WARNING: Test all gas piping
and connections, internal and
external to unit, for leaks after
installing or servicing. Correct
all leaks at once.
WARNING: Never use an
open flame to check for a leak.
Apply a noncorrosive leak detec-
tion fluid to all joints. Bubbles
forming show a leak. Correct all
leaks at once.
CAUTION: Make sure exter-
nal regulator has been installed
between propane/LP supply and
fireplace. See guidelines under
Connecting Fireplace to Gas
Supply, page 14.
PRESSURE TESTING GAS SUPPLY
PIPING SYSTEM
Test Pressures In Excess Of 1/2 PSIG
(3.5 kPa)
1. Disconnect fireplace with its appliance main
gas valve (control valve) and equipment
shutoff valve from gas supply piping system.
Pressures in excess of 1/2 psig will damage
fireplace regulator.

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16
INSTALLATION
Continued
2. Cap off open end of gas pipe where equipment
shutoff valve was connected.
3. Pressurize supply piping system by either
opening propane/LP supply tank valve for
propane/LP gas or opening main gas valve
located on or near gas meter for natural gas
or using compressed air.
4. Check all joints of gas supply piping system.
Apply noncorrosive leak detection fluid to all
joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Reconnect fireplace and equipment shutoff
valve to gas supply. Check reconnected fittings
for leaks.
Test Pressures Equal To or Less Than
1/2 PSIG (3.5 kPa)
1. Close equipment shutoff valve (see Figure 25).
2. Pressurize supply piping system by either
opening propane/LP supply tank valve for
propane/LP gas or opening main gas valve
located on or near gas meter for natural gas
or using compressed air.
3. Check all joints from gas meter to equipment
shutoff valve for natural gas or propane/LP sup-
ply to equipment shutoff valve for propane/LP
(see Figures 26 or 27). Apply noncorrosive
leak detection fluid to all joints. Bubbles
forming show a leak.
4. Correct all leaks at once.
PRESSURE TESTING FIREPLACE GAS
CONNECTIONS
1. Open equipment shutoff valve (see Figure 25).
2. Open main gas valve located on or near gas
meter for natural gas or open propane/LP
supply tank valve.
3. Make sure control knob of fireplace is in the
OFF position.
4. Check all joints from equipment shutoff valve
to gas control valve (see Figures 26 or 27).
Apply noncorrosive leak detection fluid to all
joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Light fireplace (see Operating Fireplace, page
19. Check all other internal joints for leaks.
7. Turn off fireplace (see To Turn Off Gas to
Appliance, page 21).
Figure 25 - Equipment Shutoff Valve
Open
Closed
Equipment
Shutoff
Valve
Figure 27 - Checking Gas Joints for
Propane/LP Gas
Equipment
Shutoff Valve
Gas Control Valve
Gas Meter
Figure 26 - Checking Gas Joints for
Natural Gas
Equipment Shutoff Valve
Propane/LP
Supply Tank
Gas Control Valve

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113109-01B 17
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INSTALLING LOGS
CAUTION: Do not remove the
data plates attached to the heater
base assembly. The data plates
contain important warranty and
safety information.
WARNING: Failure to position
the parts in accordance with these
diagrams or failure to use only
parts specifically approved with
this heater may result in property
damage or personal injury.
WARNING: After installa-
tion and periodically thereafter,
check to ensure that no flame
comes in contact with any log.
With the heater set to High, check
to see if flame contact any log. If
so, reposition logs according to
the log installation instructions
in this manual. Flames contact-
ing logs will create soot.
It is very important to install the logs exactly as
instructed. Do not modify logs. Only use logs
supplied with fireplace.
VYGF Models Only
1. Place back log #1 on grate to fit as illustrated
in Figure 28. Make sure middle section at
bottom of log set is seated into “U”-shaped
cutout in center of chassis (see Figure 28).
IMPORTANT: Make sure log does not cover
any burner ports (see Figure 29).
2. Place front log #2 against front grate prongs
as shown in Figure 28.
3. Place crossover log #3 on top of front and back
logs as shown in Figure 28.
4. Install fireplace screen by slipping notches
of fireplace screen over screws on front of
fireplace (see Figure 30).
INSTALLATION
Continued
Figure 28 - Installing Log Set
Figure 29 - Installing Log Set, Top View
Notches
Figure 30 - Installing Fireplace Screen
Screws for
Mounting Screen
Log Set
Chassis
Crossover
Log #3
Burner
Front
Log #2
Burner Ports
Back
Log #1
Grate
Prongs
WARNING: You must operate
this fireplace with the fireplace
screen in place. Make sure fire-
place screen is in place before
running fireplace.

www.desatech.com 113109-01B
18
OPTIONAL WIRELESS HAND-HELD
REMOTE CONTROL ACCESSORIES
(GHRCB and GHRCTB)
Installing Remote Receiver Unit
1. Disconnect switch wires from the control
valve.
2. Remove screws attaching switchplate.
3. Remove switch plate (see Figure 33). Discard
after removing.
4. Install remote receiver unit onto gas log heater
base using mounting clips.
5. Push clips firmly into place (see Figure 34).
6. Connect wires as shown in Figure 35.
Figure 33 - Switch Plate and Wiring
Harness
Figure 34 - Installing Remote Receiver
Valve
White Wire
From Receiver
Screw
Switch Plate Wires
Remote
Switch
Bracket
Ignitor
Remote Receiver
Mounting
Clips
Figure 35 - Connecting Wires
Red Wire From
Receiver
FPVF Models Only
1. Place one-piece log set on grate to fit as illus-
trated in Figure 31. Make sure middle section
at bottom of log set is seated into “U”-shaped
cutout in center of chassis (see Figure 31).
IMPORTANT: Make sure log does not cover
any burner ports (see Figure 32).
2. Install fireplace screen by slipping notches
of fireplace screen over screws on front of
fireplace (see Figure 30, page 17).
WARNING: You must operate
this fireplace with the fireplace
screen in place. Make sure fire-
place screen is in place before
running fireplace.
INSTALLATION
Continued
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Chassis
Burner
One Piece
Log Set
Middle
Section at
Bottom of
Log Set
"U" Shaped
Cutout In
Chassis
Figure 31 - Installing One Piece Log Set
Figure 32 - Installing One Piece Log Set,
Top View
One Piece
Log Set
Burner Ports

www.desatech.com
113109-01B 19
INSTALLATION
Continued
INSTALLING 9-VOLT BATTERIES
Two 9-volt batteries (not included) are required
to operate this heater with the wireless hand
held remote control set. Install one battery in the
receiver and one in the hand-held remote control
unit. Note: Only use alkaline batteries.
Installing 9-Volt Battery in Receiver
1. Locate back of receiver under front burner of
heater.
2. Locate the battery clip mounted on the back
of the receiver.
3. Slide a 9-volt battery through the clip.
4. Attach the terminal wires to the battery.
Figure 36 - Installing Battery in Remote
Receiver
Battery Clip
9-Volt Battery
Remote
Receiver
Figure 37 - Installing Battery in Hand-
Held Remote Control Unit
Battery
Cover
Terminal
Wires
Remote
Control
Unit
9-Volt Battery
Battery
Housing
Model
GHRCB
Terminal Wires
Model
GHRCTB
Installing 9-Volt Battery in Hand-Held
Remote Control Unit
1. Remove battery cover on back of remote
control unit.
2. Attach terminal wires to the battery. Place
battery into the battery housing.
3.
Replace battery cover onto remote control unit.
OPERATING FIREPLACE
FOR YOUR SAFETY
READ BEFORE LIGHTING
WARNING: If you do not fol-
low these instructions exactly,
a fire or explosion may result
causing property damage, per-
sonal injury or loss of life.
A. This appliance has a pilot which must be
lighted by hand. When lighting the pilot,
follow these instructions exactly.
B. BEFORE LIGHTING smell all around the
appliance area for gas. Be sure to smell next
to the floor because some gas is heavier than
air and will settle on the floor.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electric switch; do not
use any phone in your building.
• Immediately call your gas supplier
from a neighborʼs phone. Follow the
gas supplierʼs instructions.
• If you cannot reach your gas supplier,
call the fire department.
C. Use only your hand to push in or turn the
gas control knob. Never use tools. If the
knob will not push in or turn by hand, donʼt
try to repair it, call a qualified service tech-
nician or gas supplier. Force or attempted
repair may result in a fire or explosion.
D. Do not use this appliance if any part has
been under water. Immediately call a
qualified service technician to inspect the
appliance and to replace any part of the
control system and any gas control which
has been under water.

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20
LIGHTING
INSTRUCTIONS
WARNING: You must operate
this fireplace with the fireplace
screen in place. Make sure fire-
place screen is installed before
running fireplace.
NOTICE: During initial operation
of new fireplace, burning logs
will give off a paper-burning
smell. Open damper or window
to vent smell. This will only last
a few hours.
1. STOP! Read the safety information, page
19, column 2.
2. Make sure equipment shutoff valve is fully
open.
3. Set selector switch in OFF position.
WARNING: Burner will come
on automatically within one
minute when the selector switch
is in the ON position after the
pilot is lit.
4. Press in and turn control knob clockwise
to the OFF position.
5. Wait five (5) minutes to clear out any gas.
Then smell for gas, including near the floor.
If you smell gas, STOP! Follow “B” in the
safety information,
page 19, column 2 . If
you donʼt smell gas, go to the next step.
6. Press in and turn control knob counter-
clockwise to the PILOT position.
Press in control knob for five (5) seconds
(see Figure 38).
Note: You may be running this heater for
the first time after hooking up to gas sup-
ply. If so, the control knob may need to be
pressed in for 30 seconds or more. This will
allow air to bleed from the gas system.
7. With control knob pressed in, press and
release ignitor button. This will light pilot.
The pilot is attached to the front burner. If
needed, keep pressing ignitor button until
pilot lights.
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ON
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Figure 38 - Control Knob and Ignitor
Button Location (Shown as Supplied, No
Control Options)
Control Knob
Ignitor Button
Selector Switch
Flame Adjustment
Knob
Note: If pilot does not stay lit, contact a
qualified service person or gas supplier for
repairs. Until repairs are made, light pilot
with match. To light pilot with match, see
Manual Lighting Procedure, page 21.
8. Keep control knob pressed in for 30 seconds
after lighting pilot. After 30 seconds, release
control knob.
• If control knob does not pop out when
released, contact a qualified service
person or gas supplier for repairs.
Note: If pilot goes out, repeat steps 4
through 8.
9. Slightly push in and turn control knob coun-
terclockwise to the ON position.
10. Wait one minute and switch selector switch
to the ON position to light burner.
11. Set flame adjustment knob to any level
between HI and LO.
CAUTION: Do not try to ad-
just heating levels by using the
equipment shutoff valve.
Figure 39 - Pilot (Propane/LP)
Ignitor
Electrode
Pilot Burner
Figure 40 - Pilot (Natural)
Pilot Burner
Ignitor
Electrode
OPERATING FIREPLACE
Continued